开滦聚甲醛纤维制备技术首获发明专利授权

<正>2017年2月28日,开滦煤化工研发中心申报的发明专利——"一种聚甲醛初生纤维的制备方法"获国家知识产权局授权。这是开滦在聚甲醛纤维领域第一个获授权的发明专利。开滦煤化工研发中心于2013年启动纤维级聚甲醛合成及其纺丝技术开发项目研究,通过对外合作和自主开发,掌握了纤维级聚甲醛合成、聚甲醛纤维制备及成套设备技术,分别在聚甲醛微米纤维、初生纤     

熔融静电纺丝技术制备聚甲醛纤维

通过DSC测试得出聚甲醛的熔融温度为170℃,并通过试验确定最佳的纺丝温度为190℃。研究了聚甲醛质量分数和纺丝电压对静电纺聚甲醛纤维直径的影响,确定最佳的纺丝条件为:聚甲醛质量分数90%,电压14 k V。对聚甲醛纤维的表面形态及热性能进行了测试,结果显示:聚甲醛纤维表面光滑且粗细均匀;结晶度较高,为68.84%;熔点比纯聚甲醛熔点低,为160.25℃。     

聚甲醛纤维的发展与应用

聚甲醛具有优良的综合性能,广泛应用于包括化学纤维在内的许多领域。在未来一段时期内,聚甲醛将会得到更快的发展。介绍了聚甲醛纤维的发展历程及其各种制备方法,并阐述了聚甲醛纤维的力学性能、耐化学腐蚀性能,且对其应用领域进行了分析。     

高性能聚甲醛纤维的研发与应用实践

本文概述了开发聚甲醛纤维需要突破的关键难题,系统总结了目前国内的研发与应用现状,重点从纺丝级原料开发、纤维制备工艺、纤维性能表征及聚甲醛纤维在UHPC中的应用情况,并对其研发与应用前景进行了展望,以期为聚甲醛纤维的发展及应用提供思路与方向。     

开滦集团发明高强高模聚甲醛纤维

<正>2017年6月5日,开滦集团"一种高强高模聚甲醛纤维及其两步法热拉制备方法"获国家知识产权局发明专利授权。这是继"一种聚甲醛初生纤维的制备方法"和"一种聚甲醛微米纤维的制备方法"后的又一项聚甲醛纤维方面发明专利获得授权。至此,开滦集团煤化工研发中心申报的聚甲醛纤维方面3项发明专利全部获得授     

国内聚甲醛纤维研究进展与应用展望

本文介绍了一种新型高性能纤维-聚甲醛纤维,概述了国内聚甲醛纤维的研究进展,并对其未来市场的应用进行了系统分析,为国内聚甲醛企业扩宽产品下游市场提供一些参考建议.     

高强高模聚甲醛纤维制备获专利

正开滦煤化工研发中心依托唐山开滦化工有限公司申报的"一种高强高模聚甲醛纤维及其制备方法",获得发明专利授权。这是该公司在高强高模聚甲醛纤维制备技术方面取得的第二项授权发明专利,是其在聚甲醛纤维领域获得的第七项发明专利。"一种高强高模聚甲醛纤维及其制备方法"的关键核心技术是将聚甲醛熔体从喷丝头挤出后先在空气和冷冻     

聚甲醛纤维的制备及其力学性能研究

采用双螺杆熔融纺丝制得聚甲醛(POM)卷绕丝,通过水浴拉伸卷绕制得聚甲醛纤维。利用声速取向测试仪研究了拉伸对纤维取向的影响;利用纤维强度仪测量了纤维的力学性能,研究了拉伸温度、热定形条件、酸碱性环境对纤维力学性能的影响。结果表明:拉伸倍数增大,POM纤维的取向度、断裂强度、模量增大,断裂伸长率减小;控制水浴拉伸温度在80~95℃为宜;紧张热定形有利于提高纤维力学性能。制得的聚甲醛纤维耐碱性优良,有一定的耐酸性能。     

聚甲醛纺丝工艺进展及产品应用研究

聚甲醛纤维具有耐磨、耐碱、耐溶剂、耐海水侵蚀,以及尺寸稳定性好等优点,所以产品应用领域逐渐被开发。聚甲醛纺丝工艺有超倍拉伸法、溶液纺丝法、静电纺丝法和熔融纺丝法,其中熔融纺丝法工艺简单,成本低,效率高,是聚甲醛纤维工业化最经济、最理想的方法。随着聚甲醛熔融纺丝工业化的发展,聚甲醛纤维产品的应用领域逐渐被拓宽,主要应用于绳索、土工布、帘布、增强建材、毛刷及其他。     

开滦煤化工研发中心聚甲醛纤维制备技术获专利

<正>开滦煤化工研发中心申报的发明专利"一种聚甲醛初生纤维制备方法"于2017年4月8日获得国家知识产权局授权。这是开滦化工在聚甲醛纤维领域第一个获授权的发明专利。此次获得专利的聚甲醛初生纤维制备技术工艺过程简单,纤维生产成本低。该技术将聚甲醛树脂与少量邻甲酚醛环氧树脂混合干燥后,在挤出机中熔     

滑动轴承聚合物基自润滑材料的开发与应用进展

介绍聚四氟乙烯、聚醚醚酮、聚酰胺、聚甲醛、聚酰亚胺等滑动轴承用自润滑材料的研究开发情况、性能特点及用途,重点介绍了聚醚醚酮基复合材料的共混改性、纤维增强改性、填充改性和表面改性等方面的研究进展和应用情况,并提出了自润滑材料今后的发展方向。     

聚甲醛纤维的一步法制备及其性能研究

采用自制的熔融纺丝一体化设备,使用不同熔融指数的聚甲醛的共混料为原料,通过DSC、TGA等测试以及纺丝工艺过程的分析,得出了最佳的原料配比和熔融纺丝工艺。研究了牵伸倍数对聚甲醛纤维拉伸强度的影响,结果表明:在10倍牵伸下,可以制备出拉伸强度为6.2 cN/dtex的聚甲醛纤维。     

聚甲醛二烷基醚的研究进展

高十六烷值柴油调和组分———聚甲醛二烷基醚是目前世界上公认的环保型燃油组分,本文从我国经济、社会发展方面简要介绍了发展煤基液体燃料的必要性,并对甲醇基含氧组分聚甲醛二烷基醚的国内外研究进展进行了较为详细的介绍,包括国内外合成聚甲醛二烷基醚的方法,同时介绍了聚甲醛二甲基醚的部分理化性质及热力学函数值,指出研究甲醇基车用柴油替代燃料聚甲醛二烷基醚的必要性。     

Hydrostatically extruded glass-fiber-reinforced polyoxymethylene. I: The development of fiber and matrix orientation

This paper describes the determination of fiber and matrix orientation in oriented short-glass-fiber-reinforced polyoxymethylene (POM) composites produced by hydrostatic extrusion. The starting material was random glass fibers (25 wt% and average length 150 μm) in an isotropic POM matrix, and the oriented composites were produced by extrusion through a reducing conical die at 15°C below the polymer melting point: after extrusion the average fiber length was reduced slightly to 133 μm. Fiber orientations were measured using an image analysis method developed at Leeds University, and the matrix orientation was determined using wide angle X-ray diffraction. The development of fiber orientation with extrusion ratio was found to be close to that predicted by the pseudo-affine deformation scheme although the fiber orientation was greater than that predicted by the model at low draw ratios and slightly less at the highest draw ratio. The development of the orientation of the crystalline portion of the matrix was found to be always significantly greater than that predicted by the pseudo-affine scheme.     

Effects of surface treatments of superdrawn polyoxymethylene fibers on adhesion to epoxy resins

Strong adhesion in the superdrawn polyoxymethylene (POM) fiber/epoxy matrix system was achieved with surface treatments, 2H-hexafluoro-2-propanol (HFP) treatment, and surface phenolation of the fiber. HFP produced micropits for mechanical interlocking with the matrix. Surface phenolation formed active layers leading to interfacial miscibility. © 1996 John Wiley & Sons, Inc.     

聚甲醛的生产、性能改良及应用

简要介绍了聚甲醛的物化特性及广泛用途,并对聚甲醛的改性研究现状及研究方向做了总结,浅述了我国聚甲醛的生产现状、生产企业及发展前景,并对未来聚甲醛行业的发展进行了探讨。     

Cationic graft polymerization of polymers from carbon fiber initiated by acylium perchlorate groups introduced onto the surface

The cationic graft polymerization of several monomers initiated by acylium perchlorate groups introduced onto the carbon fiber surface was investigated to modify the surface. The introduction of acylium perchlorate groups was successfully achieved by the reaction of silver perchlorate with acyl chloride groups, which were introduced by the reaction of surface carboxyl groups with thionyl chloride. It was found that the cationic polymerization of styrene is initiated by acylium perchlorate groups on the carbon fiber. In the polymerization, polystyrene was grafted onto the carbon fiber surface through the propagation of polystyrene from the surface. Ungrafted polymer was also formed by the chain transfer reaction of growing polymer cation to the monomer. The acylium perchlorate groups have the ability to initiate cationic ring-opening polymerization of tetrahydrofuran (THF) and ε-caprolactone (CL), polyTHF and polyCL being grafted onto the carbon fiber surface, respectively. Polyacetals, such as poly(1,3-dioxolane) and polyoxymethylene, were able to graft onto the carbon fiber by cationic ring-opening polymerization of the corresponding monomers.     

聚甲醛单丝

本文介绍了在拉伸强度、弹性模量与E玻璃纤维相近的超拉伸聚甲醛(英文缩写POM)单丝的生产方法、物理及化学特性;分析了超拉伸POM单丝的成形工艺对单丝性能的影响;阐述了开发POM单丝的实用价值。     

Effect of hyperbranched poly(ester amine) additive on electrospinning of low concentration poly(methyl methacrylate) solutions

Electrospinning of low concentration polymer solutions has the advantage of producing fibers with small diameters, but unfortunately beaded fibers are often observed. This article reports the use of hyperbranched poly(ester amine) (PEA) as an additive for low concentration polymer solutions to eliminate beads and improve the fiber uniformity. Electrospinning of low concentration poly(methyl methacrylate) solutions was investigated. With only 1 wt % hyperbranched PEA, the fiber uniformity was significantly improved. The principle of improvement was investigated by measuring the solution properties, and it is inferred that the improvement is attributed to the significant increase in solution conductivity. The solution viscosity and surface tension only change slightly. The versatility of this approach was demonstrated by electrospinning low concentration solutions of two other polymers: polystyrene and polyoxymethylene. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Hot water resistance of glass‐fiber and glass‐bead reinforced thermoplastics

The hot water resistance of three kinds of short glass fiber or glass bead‐reinforced plastics [polyphenyleneether (PPE), polyphenylenesulfide (PPS), and polyoxymethylene (POM)] was studied by hot water immersion testing, tensile testing and water‐hammer fatigue testing. It was found that the degradation of the strength was observed only for the reinforced plastics under hot water immersion and that the change of the tensile strength was most drastic in glass fiber‐reinforced PPS (GFPPS). Scanning electron microscope (SEM) observations of the tensile fracture surface revealed that the change in tensile strength was attributable to the deterioration of the interface between the glass fiber and the matrix resin. The results of acoustic emission analysis also supported the conclusion that the change in strength was due to the deterioration of the interface. Although the change in the tensile strength of glass fiber‐reinforced PPE (GFPPE) was small compared with that of GFPPS, debonding between the glass fiber and the matrix resin and surface cracks was observed on the surface of the GFPPE specimens.